June 2 (Reuters) - U.S. stocks opened lower on Tuesday lower
amid uncertainty over the outcome of Greece's negotiations with
creditors and ahead of data that could point to the timing of a
U.S. rate hike.

Data due on Tuesday includes April factory orders at 10:00
a.m. ET (1400 GMT). Demand for manufactured goods is likely to
have been flat after a strong showing in March.

The auto industry will report sales for May and analysts
expect demand to have been flat or down slightly from last year.
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